Mas y Menos are a pair of twin Spanish teenage heroes. Due to a binary attraction, when the two hold hands, the tactile act induces them to travel at great speeds. They must constantly touch each other to off set their energy build up. If too much energy is built up, they could run so fast they blow up the planet. Together, they became the super hero duo, Mas y Menos (Plus and Minus). Despite speaking only Spanish, they managed to get along well with other super heroes. They were later inducted as members of the Teen Titans East.

Robin attempted to mentor them so they would turn out like him and not like his teammates. However, the other Titans opened their minds and began learning new things from the twins such as teamwork and tamales. Robin suspected Menos was a bad egg and told him a lie that Mas was in the hospital due to food poisoning. With Menos gone, Robin began to influence Mas. When the twins were reunited, their energy build up had grown to dangerous levels. The Teen Titans took to Jump City but were unable to keep up with them. Robin stole the spotlight and discharged the twins at the cost of his own well being. They took part in the Justice League's competition to find a new member. They were eliminated early on.